基于符号时间序列方法的汽油机瞬态过程排放特征获取刍议

针对内燃机瞬态排放与稳态排放之间的差异，认为分析内燃机瞬态排放信号要有特殊的手段；回顾了混沌时间序列分析的特征参数族及其运用于内燃机振动信号分析的工作；同时回顾了国外同行们钭符号动力学理论、混沌时间序列分析和信息理论发展起来的符号时间序列分析技术运用于内燃机瞬态数据分析和辨识的研究工作；介绍了国外汽油机瞬态排放测试技术的发展状况；提出可以基于符号时间序列分析对汽油机瞬态排放信号进行分析，获得瞬态排放的特征和影响因素。

On Characteristics Obtainment of Transient Emissions of Spark-ignited Engines Based on the Measure of Symbolic Time Series Analysis

In this paper it is considered that the special measur ement for analyzing the transient emissions of combustion engine is needed since the difference between the transient emissions and stable emissions. The charac teristics of chaotic time series analysis, which are applied to the analysis of vibration signal of combustion engine by the authors, are reviewed. The rese arch on analysis and identification of the transient data of combustion engine based on the symbolic time series analysis by foreign colleagues, which is deve loped from the symbolic dynamic theory, chaotic time series analysis and infor mation theory, is discussed too. The development of test measurements of transient emissions abroad is introduced. The idea that the characteristics and in fluence factors about transient emissions could be obtained by the transiente missions signal analysis of spark-ignited engines based on the symbolic time series analysis, is suggested.